[busybox] Use unsigned longs for bitwise operations in awk, thanks benoar.

- Resolves the ipcalc.sh bug on some arches, closes #3012, #3946
 - Submitted upstream as busybox bug #4774

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12427 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/busybox/patches/530-unsigned_bitwise_ops.patch

@@ -0,0 +1,36 @@
+--- a/editors/awk.c
++++ b/editors/awk.c
+@@ -2046,27 +2046,27 @@
+ 		break;
+ 
+ 	case B_an:
+-		setvar_i(res, (long)getvar_i(av[0]) & (long)getvar_i(av[1]));
++		setvar_i(res, (unsigned long)getvar_i(av[0]) & (unsigned long)getvar_i(av[1]));
+ 		break;
+ 
+ 	case B_co:
+-		setvar_i(res, ~(long)getvar_i(av[0]));
++		setvar_i(res, ~(unsigned long)getvar_i(av[0]));
+ 		break;
+ 
+ 	case B_ls:
+-		setvar_i(res, (long)getvar_i(av[0]) << (long)getvar_i(av[1]));
++		setvar_i(res, (unsigned long)getvar_i(av[0]) << (unsigned long)getvar_i(av[1]));
+ 		break;
+ 
+ 	case B_or:
+-		setvar_i(res, (long)getvar_i(av[0]) | (long)getvar_i(av[1]));
++		setvar_i(res, (unsigned long)getvar_i(av[0]) | (unsigned long)getvar_i(av[1]));
+ 		break;
+ 
+ 	case B_rs:
+-		setvar_i(res, (long)((unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1])));
++		setvar_i(res, (unsigned long)getvar_i(av[0]) >> (unsigned long)getvar_i(av[1]));
+ 		break;
+ 
+ 	case B_xo:
+-		setvar_i(res, (long)getvar_i(av[0]) ^ (long)getvar_i(av[1]));
++		setvar_i(res, (unsigned long)getvar_i(av[0]) ^ (unsigned long)getvar_i(av[1]));
+ 		break;
+ 
+ 	case B_lo: